TS3A5018QPWRQ1 - 10-Ohm Quad SPDT Analog Switch | Texas Instruments
MPN: TS3A5018QPWRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.95 | $0.95 |
| 10 | $0.86 | $8.60 |
| 100 | $0.68 | $68.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.45 | $450.00 |
Drop-in alternatives for TS3A5018QPWRQ1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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TS3A5018PWR
β Drop-Inβ In Stock
$0.2371 / Unit
View Datasheet βTS3A5018QPWRQ1 Maximum Ratings & Electrical Characteristics
| Function | Quad SPDT (2:1) analog switch |
| Number of Channels | 4 |
| On-Resistance (RON) | 10 ohm (typ) |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Signal Range | 0 V to V+ |
| Signal Direction | Bidirectional |
| Signal Type | Analog and digital |
| Automotive Qualification | AEC-Q100 (Q1) |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| Package | TSSOP-16 (PW) |
| Mounting Type | Surface Mount |
| Switching Configuration | Break-before-make |
| Control Logic | TTL/CMOS compatible select inputs |
| RoHS Status | Compliant |
| Brand | Texas Instruments |
| Application | Analog/digital signal multiplexing |
TS3A5018QPWRQ1 Pin Configuration
| Pin 1 | 1NO β Switch 1 normally-open terminal |
| Pin 2 | 1COM β Switch 1 common terminal |
| Pin 3 | 1NC β Switch 1 normally-closed terminal |
| Pin 4 | 2NO β Switch 2 normally-open terminal |
| Pin 5 | 2COM β Switch 2 common terminal |
| Pin 6 | 2NC β Switch 2 normally-closed terminal |
| Pin 7 | GND β Ground reference |
| Pin 8 | 3NO β Switch 3 normally-open terminal |
| Pin 9 | 3COM β Switch 3 common terminal |
| Pin 10 | 3NC β Switch 3 normally-closed terminal |
| Pin 11 | 4NO β Switch 4 normally-open terminal |
| Pin 12 | 4COM β Switch 4 common terminal |
| Pin 13 | 4NC β Switch 4 normally-closed terminal |
| Pin 14 | S β Select control input |
| Pin 15 | [DATA_NEEDED: pin 15 name] β Verify against TI datasheet pin diagram |
| Pin 16 | V+ β Power supply, 1.8V to 3.6V |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TS3A5018QPWRQ1 is suitable for 6 applications: Automotive Infotainment Audio Routing, Battery Management Cell Monitoring, Portable Audio Headphone/Microphone Switching, Test and Measurement Signal Routing, Industrial Control I/O Expansion, Medical Portable Diagnostic Devices.
Automotive Infotainment Audio Routing
The TS3A5018QPWRQ1's AEC-Q100 qualification and 10-ohm RON make it well suited for switching audio signals between head-unit sources, AUX inputs, and microphone paths in automotive infotainment. Four independent SPDT switches allow a codec input to be shared between an external AUX jack and an internal microphone, with 10-ohm insertion resistance adding negligible attenuation to low-impedance line-level audio. Operating from a 3.3V rail common in automotive modules, the bidirectional 0V-to-V+ signal handling accommodates AC-coupled audio. Break-before-make switching prevents audible clicks from momentary source shorts during source changes.
Recommended
Battery Management Cell Monitoring
In battery-management systems, the TS3A5018QPWRQ1 multiplexes multiple cell-voltage sense points into a single ADC input, reducing ADC channel count and cost. Its 1.8V to 3.6V supply matches typical cell-monitoring front-end rails, and the 10-ohm RON introduces only millivolt-level errors with high-impedance sense resistors. The Q1 automotive grade supports 12V/48V automotive battery packs used in EVs and HEVs. Signals up to V+ pass bidirectionally, simplifying balancing-current measurement paths. Place the switch close to the ADC and guard the switching node to minimize leakage-induced errors.
Recommended
Portable Audio Headphone/Microphone Switching
Battery-powered headsets and portable recorders use the TS3A5018QPWRQ1 to route a shared 3.5mm jack between headphone output and microphone input modes. The 1.8V low end of the supply range supports single-cell Li-Ion down-conversion rails, extending battery life, while 10-ohm RON keeps drive impedance low for 16-ohm to 32-ohm headphones. Bidirectional switching supports CTIA/OMTP headset-detection schemes where the jack pins change roles. Break-before-make action prevents pops when reconfiguring the audio path, and the compact TSSOP-16 fits space-constrained portable boards.
Recommended
Test and Measurement Signal Routing
Bench instruments and automated test equipment use the TS3A5018QPWRQ1 to switch test signals between DUT channels and measurement front ends. The 10-ohm RON preserves signal amplitude for low-frequency analog measurements, and bidirectional transmission up to V+ allows the same switch bank to feed stimulus in and route responses out. Operating from 3.3V logic rails simplifies integration with controller GPIO for select-line control. Note the 0V-to-V+ signal limitation: level-shift or AC-couple any signal outside the supply window before routing it through the switch.
Recommended
Industrial Control I/O Expansion
PLC and factory-automation I/O modules use the TS3A5018QPWRQ1 to share a single measurement or actuation resource across several field signals, cutting component count and board area. Its 1.8V to 3.6V operation integrates directly with 3.3V microcontroller rails common in industrial controllers, and the four SPDT channels provide four-way 2:1 selection per device with simple select-pin control. The 10-ohm RON suits low-frequency sensor signals such as 4-20mA-derived voltages and thermocouple front ends when used with proper scaling. Multiple devices cascade under MCU control to scale channel counts modularly.
Recommended
Medical Portable Diagnostic Devices
Portable medical monitors use the TS3A5018QPWRQ1 to multiplex biopotential or sensor signals into shared amplifier and ADC chains, minimizing channel count in battery-operated designs. The low 1.8V supply capability helps meet strict power budgets in wearable and handheld diagnostics, and 10-ohm RON adds negligible error to buffered physiological signals. Bidirectional routing supports calibration-reference switching, where the same front end alternates between patient inputs and a precision reference. AC-couple inputs and maintain high switch-node impedance discipline to preserve signal integrity in these noise-sensitive applications.
Recommended
Recommended Products Summary
Engineering reference data for TS3A5018QPWRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TS3A5018PWR | TS3A5018RSVR | SN74LVC4066A |
|---|---|---|---|---|
| Package | TSSOP-16 (PW) | TSSOP-16 (PW) - same | UQFN-16 (RSV) - different | TSSOP-14 - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices (Maxim Integrated) |
| Configuration | Quad SPDT (2:1) | Quad SPDT (2:1) | Quad SPDT (2:1) | Quad SPST |
| On-Resistance | 10 ohm typ | 10 ohm typ | 10 ohm typ | [DATA_NEEDED] |
| Supply Voltage | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | [DATA_NEEDED] |
| Automotive Grade | Yes (AEC-Q100 Q1) | No | No | No |
| Signal Direction | Bidirectional up to V+ | Bidirectional up to V+ | Bidirectional up to V+ | Bidirectional |
| Switching Action | Break-before-make | Break-before-make | Break-before-make | [DATA_NEEDED] |
Key Differentiators
- AEC-Q100 automotive qualification (vs TS3A5018PWR)
- True quad SPDT in a compact TSSOP-16 (vs SN74LVC4066A)
- Low-voltage 1.8V operation (vs MAX4544)
Design Notes
Decouple V+ with a 0.1uF ceramic capacitor placed within 2mm of pin 16, plus a 1uF bulk capacitor per device group. The TS3A5018QPWRQ1 draws minimal quiescent current, but switching transients on select lines can couple supply droop into the analog signal path if decoupling is poor. Keep the analog signal amplitude strictly within 0V to V+; signals beyond this window forward-bias the internal ESD structures and cause distortion or damage.
With 10-ohm RON, insertion loss matters when source impedance is low: driving a 10-ohm switch into a high-impedance load adds negligible error, but series RON with downstream low-impedance loads forms a divider. For audio paths, keep the load impedance at least 100x RON. Route switched analog traces away from fast digital select lines and use ground pour between the select inputs and the signal terminals to reduce charge injection coupling.
A common mistake is assuming the Q1 and standard TS3A5018 parts differ electrically - they do not; only qualification level differs, so do not pay the Q1 premium in non-automotive designs. Also, never leave select (S) inputs floating; tie them through a pull-up or pull-down so switch state is defined during power-up. Verify the unused NO/NC terminals are grounded or tied to a defined potential to avoid floating-node crosstalk between channels.
Compliance Information
Q1 suffix denotes AEC-Q100 automotive qualification per TI product documentation. RoHS/lead-free per TI current product portfolio; REACH and halogen-free declarations require TI quality documentation.
